Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Gases: Fermions II
Q 11.3: Vortrag
Montag, 23. März 2015, 15:15–15:30, K/HS2
Quantum Simulation of Lattice Gauge Theories Out of Equilibrium — •Valentin Kasper1, Florian Hebenstreit2, Markus Oberthaler3,4, and Jürgen Berges1,4 — 1Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg — 2Universität Bern - Albert Einstein Center for Fundamental Physics (AEC) Sidlerstrasse 5, CH-3012 Bern, Switzerland — 3Kirchhoff-Institute for Physics, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg — 4ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
Quantum link models have been proposed as an alternative regularization of lattice gauge field theories. The U(1) quantum link models are constructed by replacing the parallel transporters of Wilsonian lattice gauge theory with quantum spin operators acting on 2S+1 states per link. The original gauge theory is recovered in the limit of large representations S → ∞. Due to the dramatic increase of the size of the Hilbert space, investigating the dynamics of these models for S ≫ 1 becomes difficult. We study the limit of large spin representations by a functional integral approach and report on the transition from finite S to S → ∞. As a specific application, we present results on the dynamical version of the Schwinger effect.